Cops: Shirley fire that killed mom, 3 kids began in living room

Aidan Tarbell, 7, top left and Jennifer McCusker, bottom left, both died in a house fire along with 2-year-old twins. At right, the aftermath of a fire that broke out at 16 Hollywood Dr. in Shirley is shown. (Oct. 12, 2013) Photo Credit: James Carbone

Aidan Tarbell, 7, top left and Jennifer McCusker, bottom left, both died in a house fire along with 2-year-old twins. At right, the aftermath of a fire that broke out at 16 Hollywood Dr. in Shirley is shown. (Oct. 12, 2013) (Credit: James Carbone)

Suffolk County police investigators haven't said what ignited the Shirley house fire that killed a mother and her three children, but they ruled the blaze accidental Saturday.

The Oct. 11 fire began in the living room of the single-story home, taking the lives of Jennifer McCusker, 41; Aidan Tarbell, 7; and 2-year-old twins Brendan and Ava Jane Mistretta.